| 12345678910111213141516171819202122232425262728293031323334 | #ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED#define BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED////  owner_less.hpp////  Copyright (c) 2008 Frank Mori Hess//  Copyright (c) 2016 Peter Dimov////  Distributed under the Boost Software License, Version 1.0. (See//  accompanying file LICENSE_1_0.txt or copy at//  http://www.boost.org/LICENSE_1_0.txt)////  See http://www.boost.org/libs/smart_ptr/ for documentation.//namespace boost{template<class T = void> struct owner_less{    typedef bool result_type;    typedef T first_argument_type;    typedef T second_argument_type;    template<class U, class V> bool operator()( U const & u, V const & v ) const    {        return u.owner_before( v );    }};} // namespace boost#endif  // #ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED
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